In June 1849, a tense inflamed swelling was opened in the perinæum of a
patient, who had for years laboured under a very obstinate stricture.
A quantity of matter first escaped, and subsequently serum, mixed with
shreds of lymph and small quantities of pus and blood, continued to
flow for some time. Portions of this mixed fluid were received into
separate vessels; they coagulated on an average in about two minutes.